Parker RL Series Technical specifications
Maintenance
Instructions
MI-137 Revision A
Parker Hannifin Corporation
Instrumentation Valve Division
Jacksonville, Alabama
1
RL Series Relief Valve
Figure 1: RL Series
Relief Valve Cross
Sectional View
Figure 2: RL Series
Relief Valve with
Manual Overrride
Cross Sectional View
Spring Acquisition
The valve is shipped asse bled co plete less the adjust ent cap and the lock nut. Springs can be acquired by
ordering the appropriate kit. Spring kits are as follows:
Spring Pressure Range Kit Name Color Code
10-25 psi KIT-RL4SP-0-25 Magenta
25- 50 psi KIT-RL4SP-25-50 Brown
50-100 psi KIT-RL4SP-50-100 Purple
100-150 psi KIT-RL4SP-100-150 Dark Green
150-225 psi KIT-RL4SP-150-225 Dark Blue
225-400 psi KIT-RL4SP-225-400 White
10-225 psi KIT-RL4SP-10-225 None
Each kit includes a Spring, two (2) PTFE washers, a label, locking wire, and a lead tie down disk.
Parker Hannifin Corporation
Instrumentation Valve Division
Jacksonville, Alabama
MI-137
2
DISASSEMBLY
WARNING: MAKE CERTAIN T E SYSTEM IN W IC T E VALVE IS INSTALLED IS DRAINED AND/OR EX AUSTED
OF ALL PRESSURES BEFORE VALVE DISASSEMBLY OR REMOVAL OCCURS.
1. If the valve is locked into position, break apart the Locknut and Cap by turning the Locknut clockwise with a 7/8
inch wrench while holding the Cap with another 7/8 inch wrench.
2. If the valve is a anual version, loosen the Set Screw in the Handle by using a 5/64 hex Allen wrench and unthread
the Handle fro the Manual Upper Ste by holding the ste and rotating the Handle counter-clockwise.
3. Unthread the Cap fro the Bonnet by rotating the Cap counter-clockwise.
4. Re ove the Spring and PTFE Washers and set the aside for reuse during reasse bly. (It is possibly easier to
re ove the lower PTFE washer after step 5.)
5. Re ove the Bonnet fro the Valve Body by turning counter-clockwise with a 7/8 inch wrench.
6. Using a pair of pliers, secure a grip onto the Upper Ste /Manual Upper Ste and pull the cartridge asse bly fro
the Valve Body.
7. Disengage the Upper Ste /Manual Upper Ste and the Lower Ste by holding the Lower Ste with a pair of
adjustable pliers (Do not cla p over the cri ped o-ring if the ste is to be reused.) and unthreading the Upper
Ste /Manual Upper Ste with a 7/16 inch wrench.
8. Re ove the Lower Ste fro the Body Bonnet by grasping the end that includes the cri ped seat and gently pull
it out.
O-RING/BACK-UP RING INSERTION
1. Place the andrel over the appropriate end of the co ponents as seen in the drawing.
2. Slide the O-ring or O-ring/Back-up ring co bination slowly and gently over the andrel (Note the orientation of the
O-ring and back-up ring).
3. Place the O-ring or O-ring/Back-up ring into the groove provided for it.
Gently slide the o-ring over the andrel in this direction
Lower Ste Asse bly
Body Bonnet Asse bly
Parker Hannifin Corporation
Instrumentation Valve Division
Jacksonville, Alabama
MI-137
3
Figure 4: RL Series Relief Valve with Manual Override Exploded View
Setting Desired Cracking Pressure
1. Rotate the Cap to set the desired cracking pressure.
2. Tighten the Lock Nut against the Cap.
f required, secure the pressure setting by using the Lockwire to fasten the Cap and Valve Body together.
REASSEMBLY
MAKE CERTAIN T AT ALL PARTS ARE FREE OF DIRT OR OT ER CONTAMINANTS BEFORE REASSEMBLY.
1. Place the Teflon coated O-ring onto the Lower Ste and the O-ring and Back-up ring onto the Body Bonnet as
shown in the section titled O-Ring/Back-up Ring Insertion .
2. Insert the Lower Ste into the Body Bonnet being careful not to da age the O-ring or Back-up Ring.
3. Thread the Upper Ste / Manual Upper Ste onto the Lower Ste and torque to 12 in-lbs by gripping the Lower
Ste with a pair of pliers and rotating the Upper Ste clockwise with a 7/16 inch hex socket torque wrench. (Do
not cla p over the cri ped portion of the Lower Ste .)
4. Insert the asse bly fro 4 into the Valve Body being careful not to da age the O-ring and Back-up Ring.
5. Apply a liberal a ount of lubricant, as consistent with the Valves service require ents, onto the body ste end
threads.
6. Install the Bonnet onto the Valve Body and torque to 30 ft-lbs by turning clockwise with a 7/8 inch hex socket
torque wrench.
7. Place a PTFE Washer into the bore of the Bonnet, insure that the washer is lying flat against the face of the Upper
Ste /Manual Upper Ste .
8. Place the Spring into the bore of the Bonnet.
9. Place the other PTFE Washer onto the top of the Spring.
10. Place an appropriate lubricant, consistent with the valves service require ents, on the internal threads of the Cap.
11. Thread the Cap onto the Bonnet. Insure that the washer re ains atop the Spring during thread engage ent.
12. If your syste de ands, lock the Cap in place by holding it with a 7/8 inch wrench and turning the Locknut counter-
clockwise until it is snug against the Cap.
13. If the valve has a Manual Upper Ste , thread the Handle onto it.
INI-237
Parker Hannifin Corporation
Instrumentation Valve Division
Jacksonville, Alabama
4
VALVE CONNECTO MAKE-UP INST UCTIONS
MALE AND FEMALE PIPE PORTS
Wrench flats are provided on the Valve Body. It is recommended a smooth- jawed wrench or vise be used to grip the Valve Body.
1. On the male threaded part of the connection apply a high quality pipe joint compound or PTFE tape made for this purpose. When PTFE tape is
used it is recommended two full turns of tape be applied. PTFE tape should not be overhanging or covering the first thread
2. Engage the Valve and the other component part together until hand-tight.
3. With a proper wrench holding both the Valve and the component part continue to tighten to achieve a leak-tight joint.
ULTRASEAL CONNECTIONS
1. Insert the proper O-Ring into the UltraSeal fittings O-Ring groove. Position the UltraSeal gland sealing face against the O-Ring and then advance
the Nut to a finger-tight position.
2. A positive seal is obtained by advancing the Nut no less than 1/4 turn from the finger-tight position. Proper UltraSeal make-up is achieved when
a sharp rise in required application torque occurs which indicates proper seal face contact and O-Ring seal compression into the UltraSeal
groove.
VACUSEAL CONNECTIONS
1. A positive seal is obtained by advancing the Nut 1/8 turn from the finger-tight position.
2. A new gasket should be installed upon each fitting re-make to insure system pressure integrity.
TUBE FITTING CONNECTIONS
1. Insert the tube into the Valve port until the tube bottoms out in the Valve Body. Care should be exercised to insure the tube is properly aligned with
the Valve Body and port.
2. Normal make-up for US Customary port sizes 1 thru 3 (1/16 thru 3/16 inch) and SI port sizes 2 thru 4 (2 thru 4 mm) is 3/4 turn from finger tight.
Normal make-up for US Customary port sizes 4 thru 16 (1/4 thru 1 inch) and SI port sizes 5 thru 25 (5 thru 25 mm) is 1 1/4 turn from finger tight.
For larger port sizes consult Parker Ferrule Presetting Tool Instructions.
PLEASE FOLLOW THE ABOVE DIRECTIONS FOR COUNTING THE NUMBER OF TURNS FOR PROPER FITTING MAKE-UP. DO
NOT MAKE-UP TUBE FITTINGS BY TORQUE OR FEEL. VARIABLES SUCH AS TUBING AND FITTING TOLERANCES, TUBE
WALL THICKNESS, AND THE LUBRICITY OF NUT LUBRICANTS CAN RESULT IN AN IMPROPERLY ASSEMBLED TUBE FITTING
CONNECTION.
A -Two ferrule A-LOK ®
compression port
M -ANSI/ASME B1.2 .1
External pipe threads
Z -Single ferrule CPITM
compression port
Q -UltraSeal face
seal port
F -ANSI/ASME B1.2 .1
Internal pipe threads
V -VacuSeal face
seal port
Parker Hannifin Corporation
Instrumentation Valve Division
2651 Alabama Highway 21 North
Jacksonville AL 36265-9681
USA
Phone: (256) 435-2130
Fax: (256) 435-7718
www.parker.com/IVD
MI-137 Revision A
WARNING
FAILURE OR IMPROPER SELECTION OR IMPROPER USE OF T E PRODUCTS AND/OR SYSTEMS DESCRIBED
EREIN OR RELATED ITEMS CAN CAUSE DEAT , PERSONAL INJURY AND PROPERTY DAMAGE.
This docu ent and other infor ation fro Parker Hannifin Corporation, its subsidiaries and authorized distributors
provide product and/or syste options for further investigation by users having technical expertise. It is i portant that
you analyze all aspects of your application and review the infor ation concerning the product or syste in the current
product catalog. Due to the variety of operating conditions and applications for these products or syste s, the user,
through its own analysis and testing, is solely responsible for aking the final selection of the products and syste s
and assuring that all perfor ance, safety and warning require ents of the application are et.
The products described herein, including without li itation, product features, specifications, designs, availability and
pricing, are subject to change by Parker Hannifin Corporation and its subsidiaries at any ti e without notice.
ALL PARKER VALVES MUST PASS A RIGID OPERATIONAL AND LEAKAGE TEST BEFORE LEAVING T E FAC-
TORY. IT IS RECOMMENDED AFTER ANY REASSEMBLY, T E VALVE S OULD BE TESTED BY T E USER FOR
OPERATION AND LEAKAGE. IF T ESE INSTRUCTIONS ARE NOT FULLY COMPLIED WIT , T E REPAIRED
PRODUCT MAY FAIL AND CAUSE DAMAGE TO PROPERTY OR INJURY TO PERSONS. PARKER ANNIFIN
CANNOT ASSUME RESPONSIBILITY FOR PERFORMANCE OF A CUSTOMER SERVICED VALVE.
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